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GRAIN SORGHUM PERFORMANCE
TRIALS IN OKLAHOMA, 2001
PRODUCTION TECHNOLOGY CROPS
OKLAHOMA COOPERATIVE EXTENSION SERVICE
DEPARTMENT OF PLANT AND SOIL SCIENCES
DIVISION OF AGRICULTURAL SCIENCES & NATURAL RESOURCES
OKLAHOMA STATE UNIVERSITY
PT 2001-25 November 2001 Vol. 13, No.25
Rick Kochenower
Area Research and Extension Specialist
Plant and Soil Sciences Department
TRIAL OBJECTIVES AND PROCEDURES
Each year, performance trials for hybrid grain
sorghums are conducted by the Oklahoma
Cooperative Extension Service to provide producers,
extension educators, industry representatives, and
researchers with information on hybrid grain
sorghums marketed in Oklahoma.
Performance trials were conducted at six locations in
Oklahoma: Altus, Blackwell, Enid, Goodwell, Keyes,
and Tipton. Dry-land trials were conducted at all
locations, with an additional irrigated trial at
Goodwell. The Enid location is a unique trial to
evaluate certain hybrids (generally early and medium
maturity) for planting in late April.
Grain sorghum hybrids entered (Table 1) were
assigned by companies to their respective maturity
groups (early, medium, and late) and trial locations.
Hybrids tested at the Enid location where determined
by Oklahoma State University and maturity date
information provided by companies. Companies
submitted all hybrid characteristics presented in
Table 1. This information was not determined or
verified by Oklahoma State University. Company
participation was voluntary; therefore some hybrids
marketed in Oklahoma were not included in the test.
Each maturity group was tested in a randomized
complete block design with four replications. Plots
were 2 rows: (40-inches wide at Tipton and Altus,
with 30-inch rows at all other locations) by 25 feet.
Plots are trimmed to 20 feet prior to harvest.
Target populations are listed with results of
respective locations. Cooperating producers,
fertilization, cultural practices, soil series, and
herbicide use on all trials is also listed with the
results tables. Rainfall data from nearest Mesonet
site is also listed. All trials are within five miles of a
mesonet site except for the Enid and Keyes locations.
Tractor powered cone planters were used to plant all
trials with seeding rates adjusted for trial location.
Trials were harvested with a (Massey-Ferguson 8)
plot combine.
GROWING CONDITIONS
Moisture
Conditions were excellent early in the growing
season, with excellent soil moisture and warm
temperatures. As the season progressed conditions
deteriorated, due to the lack of rainfall and high
temperatures. Based on Oklahoma Climatological
Service data this summer (June, July, and August)
was one of the driest in the last 51 years in Oklahoma
(Blackwell 4th, Enid 1st, and Goodwell 2nd).
Therefore yields were reduced from last year except
in the Keyes location where rainfall was received
during the summer.
Insects
Chinch bugs along with false chinch bugs were a
problem in the North Central region of the state in
2001. Chinch bugs may have affected stand
establishment early in the growing season. False

GRAIN SORGHUM PERFORMANCE
TRIALS IN OKLAHOMA, 2001
PRODUCTION TECHNOLOGY CROPS
OKLAHOMA COOPERATIVE EXTENSION SERVICE
DEPARTMENT OF PLANT AND SOIL SCIENCES
DIVISION OF AGRICULTURAL SCIENCES & NATURAL RESOURCES
OKLAHOMA STATE UNIVERSITY
PT 2001-25 November 2001 Vol. 13, No.25
Rick Kochenower
Area Research and Extension Specialist
Plant and Soil Sciences Department
TRIAL OBJECTIVES AND PROCEDURES
Each year, performance trials for hybrid grain
sorghums are conducted by the Oklahoma
Cooperative Extension Service to provide producers,
extension educators, industry representatives, and
researchers with information on hybrid grain
sorghums marketed in Oklahoma.
Performance trials were conducted at six locations in
Oklahoma: Altus, Blackwell, Enid, Goodwell, Keyes,
and Tipton. Dry-land trials were conducted at all
locations, with an additional irrigated trial at
Goodwell. The Enid location is a unique trial to
evaluate certain hybrids (generally early and medium
maturity) for planting in late April.
Grain sorghum hybrids entered (Table 1) were
assigned by companies to their respective maturity
groups (early, medium, and late) and trial locations.
Hybrids tested at the Enid location where determined
by Oklahoma State University and maturity date
information provided by companies. Companies
submitted all hybrid characteristics presented in
Table 1. This information was not determined or
verified by Oklahoma State University. Company
participation was voluntary; therefore some hybrids
marketed in Oklahoma were not included in the test.
Each maturity group was tested in a randomized
complete block design with four replications. Plots
were 2 rows: (40-inches wide at Tipton and Altus,
with 30-inch rows at all other locations) by 25 feet.
Plots are trimmed to 20 feet prior to harvest.
Target populations are listed with results of
respective locations. Cooperating producers,
fertilization, cultural practices, soil series, and
herbicide use on all trials is also listed with the
results tables. Rainfall data from nearest Mesonet
site is also listed. All trials are within five miles of a
mesonet site except for the Enid and Keyes locations.
Tractor powered cone planters were used to plant all
trials with seeding rates adjusted for trial location.
Trials were harvested with a (Massey-Ferguson 8)
plot combine.
GROWING CONDITIONS
Moisture
Conditions were excellent early in the growing
season, with excellent soil moisture and warm
temperatures. As the season progressed conditions
deteriorated, due to the lack of rainfall and high
temperatures. Based on Oklahoma Climatological
Service data this summer (June, July, and August)
was one of the driest in the last 51 years in Oklahoma
(Blackwell 4th, Enid 1st, and Goodwell 2nd).
Therefore yields were reduced from last year except
in the Keyes location where rainfall was received
during the summer.
Insects
Chinch bugs along with false chinch bugs were a
problem in the North Central region of the state in
2001. Chinch bugs may have affected stand
establishment early in the growing season. False